Bond-based peridynamic fatigue analysis of ductile materials with Neuber’s plasticity correction

Date

2024-01-01

Author

Altay, Ugur
Dorduncu, Mehmet
Kadıoğlu, Fevzi Suat
Madenci, Erdogan

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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This study introduces an approach for performing bond-based (BB) peridynamic (PD) fatigue analysis of ductile materials. Existing BB PD fatigue models do not account for the effect of plastic deformation. The current approach addresses this by incorporating Neuber’s plasticity correction concept into the fatigue model. Neuber’s correction adjusts the stress and strain predictions of the PD elastic solution to account for local plastic deformation around crack tips. The PD fatigue simulations demonstrate the effectiveness of this method and improvements in fatigue life predictions by considering local plasticity effects. The numerical results first examine the response of a ductile plate without a crack under quasi-static monotonic loading. Subsequently, specimens exhibiting Mode I and mixed-mode crack propagation paths due to cyclic loading are analyzed. The PD predictions accurately capture the test data. Additionally, the model specifically investigates the effect of a stop hole on fatigue life.

Subject Keywords

Crack, Fatigue, Neuber’s rule, Peridynamics, Plasticity, Stop hole

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85211816909&origin=inward
https://hdl.handle.net/11511/112840

Collections

Department of Mechanical Engineering, Article